Latch mechanism



Feb. 7, 1928. 1,658,762

G. DlcKERsoN v LATCH MEGHANI SM Filed May 20, 1925 Patented Feb. 7,1928.

UNITED STATES PATENT foEFlcE.

GEORGE DICKEBSON, l' CLEVELAND, OHIO.

LATCH MECHANISH.

Application led lay 20, 1925. Serial No. 31,515.

My invention relates to means for locking objects to each other by meansof a latch mechanism.

One object of my inventionis a simple and efficient latch mechanism.

Another object of my invention is a simple and efficient latch mechanismhaving a double lock and a seal means.

Another object of/my invention is a latch lo mechanism which remainslocked even when the final seal is not present.

Another object of my invention is a latch mechanism which remains lockedwhen the lockable members are shaken or vibrated or I6 rattled.

In many instances two members are to be locked to each other and one orboth of these members shake or vibrate or rattle in such a manner thatthe latch mechanism unlocks itself. Latch mechanisms for such members,

as previously made, had no means for preventing the unlocking of thelatch mechanism by the rattling or otherwise moving of the members.

The present invention aims 'to prevent such rattling or other movementof the members from unlocking the'latch mechanism.

My invention is sutliciently illustrated in the accompanying drawing inwhich my invention is shown as embodied in a atch mechanism for afreight car door and in which y Fig. 1 is a general perspective view ofa certain latch mechanism applied to the sliding door of a freight car;all members are shown in locked position.

Fig. 2 is a section taken on a plane indicated by the line 2 2 in Fig. 1and shows the manner of attaching the bolt to the plate.

Similar reference characters refer to similar parts throughout theviews.

The latch mechanism shown in the accom panying drawing comprises,principally, the plate A, the bracketB, the bolt C, the bolt D, the studE, and the stud F.

The plate A is secured tothe sliding door G by means of the bolts 10.

The bracket B has the body portion 11 secured to the frame H ofthe-opening for the door G by means of the bolts l2. The ear 13 extendsupward from the body 11 and vhas the opening 14 therethrough. The ear 15extends upward from the body 11, adjacent to the ear 13. 55 The bodyportion 16 of thebolt C slides 'or when stopping or startin on the plateA and has the slot 17 therethrough and the nose 18 of the bolt C extendsthrough the opening 14 of the ear 13 when the bolt C is in lockingposition.

The stud E has the'reduced end 19 (Fig. 2) riveted to the plate A andalso has the round middle portion 2O adapted to the slot 17 and also hasthe head 21 to retain the bolt C on the plate A and to permit the bolt Cto slide longitudinally on the plate A.

The body portion 22 of the bolt D slides on the ear 15 and has the slot23 there-- through and the nose 24 of the bolt D eX- tends through theopening 25 in the nose 18 ofthe bolt C when the bolts C and D are inlocking position.

The noseI 24 has the opening 26 therethrough near the outer end thereofthrough which is inserted a seal or final lock means as the padlock Ishown for instance.

4The stud F is similar to the stud E shown sectionally in Fig. 2 and hasthe reduced end 2T riveted to the ear 15 and also has the round middleportion 28 adapted to the slot 23 and also has the head 29 to retain thebolt D on the ear 15 and to permit the bolt D to slide longitudinally onthe ear 15.

As to operation As previously mentioned, the drawing shows the latchmechanism Vin locked posi# tion.

To unlock the lock mechanism Remove the seal I from the nose 24 andslide the bolt D longitudinally upward until the lnose 24 is out of theopening 25 of the nose 18. Then slide the bolt C longitudinally backwarduntil the nose 18 is out of the opening 14 of t-he ear 13. The latchmechanism is now completely unlockedand the door G can be opened bysliding the same backward in the usual manner.

In order to lock the mechanism Reverse the unlocking operationdescribed.

In the mechanism shown and described, a double lock ,of the latchmechanism is effected which does not unlock easily. The bolt C is lockedby the transversely disposed bolt D which is locked by the seal I.

Freight or similar cars are usually provided with sliding doors movablelon 'tudinally of the car. When coupling suc cars such cars, acertain-momentum is create in the door tending t0 move the doorlongitudinally; the latch mechanism is provided to prevent the 110 doorfrom being opened either by the momentum mentioned or by other means orfor various reasons.

Even when the seal I is not inserted into the latch mechanism, the noseof the bolt D remains through the nose of the bolt C due to its owngravity and thereby prevents the bolt C from disengaging the bracket Beven when the door is shaken violently or when a lon itudinal momentumis set up in the door.

Iigi previous latch mechanisms, the shaking or the longitudinal momentumof the door permits the bolt to disengage the bracket when the seal isnot present whereas, with the present invention, ,the door 'remainslocked irrespective of whether the seal is present or not.`

"The bolt C need not slide or swivel on the plate A as shown anddescribed but may be rigidly secured to the door although the door maybe locked more conveniently when the bolt C does so slide and swivel. vThis sliding and swiveling feature of the bolt C also prevents the samefrom striking the bracket when the door is being closed and probablybreak the bracket or the bolt.

1.. In a latch mechanism, two` interlockable bolts individually mounted,one of said bolts having a portion thereof extendible longitudinallythrough the other and conned therein in all ateral directions, each ofsaid bolts supported on a pivot pin to permit of adjustment of the enaging portions thereof independent'of sai individual mountings thereof.7

2. In a latch mechanism, two interlockable bolts, one of said boltshaving a portion thereof extendible longitudinally through a portion ofthe other one of said bolts and confined therein in all lateraldirections, each of said bolts supported on a pivot pin to permit ofadjustment of the e aging portions of said bolts and movab elongitudinally thereon to permit the enga ement and the disengagement of'said74 bo ts.

3. In a latch mechanism, two interlockable bolts individually mounted,one of said bolts havin a portion thereof entendible longitudina ythrough a portion 'of the other one of said bolts and confined thereinin all lateral directions, each of said bolts suport/ed on a pivot pinpositioned in said individual mountings thereof and pivotable thereon topermit of adjustment of the engaging portions of said bolts and movablelongitudinally thereon to permit the engagement and the disengagement ofsaid bolts.

4. In a latch mechanism, two interlockable bolts each slidablelongitudinally and at an angle to 'the other, one of said bolts having ahole through the same, and the other one 'of said-bolts having a noseextendible through said hole and vconfined therein in all lateraldirections by the walls thereof.

5. In a latch mechanism, two interlockable bolts at an angle with eachother, one of said bolts having a. hole through the same, and the otherone of said bolts having a nose extendible through said hole andconfined therein in all lateral directions by the walls thereof; each ofsaid bolts being supported on an individually mounted pivot pin andpivotable thereon to permit of adjustment of said nose and of said holeand movable longitudinally thereon to permit the engagement and thedisengagement of said bolts.

6. In a latch mechanism, two interlockable bolts each of said boltshaving a nose and a hole through the same, one of said bolts mounted tobe moved longitudinally to move said hole in the nose thereof intoposition to receive said nose of the other one of said bolts, the otherone of said bolts mounted to be moved longitudinali to extend the nosethereof through an out of said .hole in said one bolt, said nose of saidother bolt being confined in all lateral directions by the walls of saidhole through the nose of said one bolt, and said hole in said other boltadapted to receive a seal means.

7. In a latch mechanism, a bracket having an ear and a hole through theear, a bolt having a nose extendible through and out of said holelongitudinally and confined therein laterally in all directions by thewalls thereof and having a hole through the nose, and a bolt having anose extendible through and out of'said hole throu h the nose of thefirst mentioned bolt and adjacent to said ear and having a hole throughthe nose thereof to receive a seal. .I

8. In a latch mechanism, a pair of brackets mountable on members movablein relation to each other, one of said brackets having an ear and a holethrough the ear, a bolt movably supported on the other one of saidbrackets and having a nose extend- `ible through and out of said hole inthe cai' and having a hole through the nose, said nose being confined inall lateral directions by the walls of said hole in the ear, a boltmovably supported on said one bracket' and l ce lli

having a nose extendible through and out of said hole in the nose of theiirst mentioned bolt adjacent to said ear and having a hole through thenose thereof to receive a seal, and said nose of the second mentionedbolt conlined in all lateral directions by the walls of said holethrough the nose of the first mentioned bolt.

9. In a latch mechanism, a pair of brackets vmountable on membersmovable in relation to each other and each having a pivot pin, one ofsaid brackets having an ear and a hole through the ear,ya bolt supportedon said pivot pin in the other one of said brackets and pivotable andlongitudinally movable thereon and'having a nose extendible through andout of vsaid hole in the ear and having a hole through the nose thereof,said nose being confined in all lateral directions by the walls of saidhole in the ear, a bolt supported on said pivot pin in said bracket withthe ear and having a nose extendible through and out of said hole in thenose of the first mentioned bolt 10 adjacent to said ear and having ahole through the nose thereof to receive a, seal, and said nose of thesecond mentioned bolt conned in all lateral directions by the Walls ofsaid hole through the nose of the first 15 `mentioned bolt.

GEORGE DICKERSON.

